tbody tr:nth-child(odd) {  
   background-color: #fff; /* green, 10% alpha */  
}  
tbody tr:nth-child(even) {  
    background-color: #ddd; /* red, 30% alpha */  
}


.ct{
    text-align: center;
}

#search{

    position: fixed;
    left: 70%;
    top: 200px;
    width: 240px;
    height: 30px;
    background-color: white;
    border-radius: 2px;

}
.btn {
    position: fixed;
    left: 75%;
    top: 234px;
    margin-left: 1.0em;
    padding: 0.1em 0.8em;
    border-radius: 2px;
    background-color: white;
    color: black;
    border: 1px solid #0366d6;
    transition-duration: 0.4s;
    text-decoration: none;
    font-size: 16px;
    cursor: pointer;
    vertical-align: middle;
}
.btn:hover {
    background-color: #2f8af1;
    color: #fff;
}
    